Police on Saturday said they detained 76 people across Poland and checked nearly 50,000 schools nationwide as part of efforts to prevent further violence following two school attacks earlier in the week. Police in Poland have detained 76 people and checked nearly 50,000 schools to prevent further violence after two school attacks Key points and original sources are listed below.

• Police on Saturday said they detained 76 people across Poland and checked nearly 50,000 schools nationwide as part of efforts to prevent further violence following two school attacks earlier in the week. On Friday, schools across Poland stepped up security, wi...S1

• Police in Poland have detained 76 people and checked nearly 50,000 schools to prevent further violence after two school attacksS2